AX Agent 코워크·코드 흐름과 컨텍스트 관리를 claude-code 기준으로 대폭 정리

- 코워크·코드 프롬프트, 도구 선택, 문서 생성/검증 흐름을 claude-code 동등 품질 기준으로 재정렬함

- OpenAI/vLLM 경로의 오래된 tool history를 평탄화하고 최근 이력만 구조화해 컨텍스트 직렬화를 경량화함

- AX Agent UI를 테마 기준으로 재구성하고 플랜 승인/오버레이/이벤트 렌더링/명령 입력 상호작용을 개선함

- 파일 후보 제안, 반복 경로 정체 복구, LSP 보강, 문서·PPT 처리 개선, 설정/서비스 인터페이스 정리를 함께 반영함

- README.md 및 docs/DEVELOPMENT.md를 작업 시점별로 갱신함

- 검증: dotnet build src/AxCopilot/AxCopilot.csproj -c Release -v minimal -p:OutputPath=bin\\verify\\ -p:IntermediateOutputPath=obj\\verify\\ (경고 0, 오류 0)

src/AxCopilot/Views/ChatWindow.PlanApprovalPresentation.cs

@@ -14,8 +14,21 @@ public partial class ChatWindow
     {
         return async (planSummary, options) =>
         {
+            // 도구 실행 승인(확인/건너뛰기/취소)은 간결한 별도 다이얼로그로 처리
+            var isToolApproval = options.Contains("확인") && !options.Contains("승인");
+            if (isToolApproval)
+            {
+                string? toolResult = null;
+                await Dispatcher.InvokeAsync(() =>
+                {
+                    toolResult = ToolApprovalWindow.Show(this, planSummary, options);
+                });
+                return toolResult;
+            }
+
+            // 계획 승인은 PlanViewerV2로 처리
             var tcs = new TaskCompletionSource<string?>();
-            var steps = TaskDecomposer.ExtractSteps(planSummary);
+            var steps = ExtractPlanSteps(planSummary);
 
             await Dispatcher.InvokeAsync(() =>
             {
@@ -26,10 +39,10 @@ public partial class ChatWindow
                 ShowPlanButton(true);
                 AddDecisionButtons(tcs, options);
                 // 플랜 창 자동 표시 (사용자가 직접 BtnPlanViewer 클릭 안 해도 됨)
-                if (_planViewerWindow != null && IsWindowAlive(_planViewerWindow))
+                if (_planViewerWindow != null && IsPlanWindowAlive())
                 {
-                    _planViewerWindow.Show();
-                    _planViewerWindow.Activate();
+                    PlanWindow?.Show();
+                    PlanWindow?.Activate();
                 }
             });
 
@@ -38,7 +51,7 @@ public partial class ChatWindow
             {
                 await Dispatcher.InvokeAsync(() =>
                 {
-                    _planViewerWindow?.Hide();
+                    PlanWindow?.Hide();
                     ResetPendingPlanPresentation();
                 });
                 return "취소";
@@ -59,21 +72,12 @@ public partial class ChatWindow
                 agentDecision = $"수정 요청: {result.Trim()}";
             }
 
-            if (result == null)
+            // 승인/취소/수정 모두 계획 창 닫고 상태 초기화
+            await Dispatcher.InvokeAsync(() =>
             {
-                await Dispatcher.InvokeAsync(() =>
-                {
-                    _planViewerWindow?.SwitchToExecutionMode();
-                });
-            }
-            else
-            {
-                await Dispatcher.InvokeAsync(() =>
-                {
-                    _planViewerWindow?.Hide();
-                    ResetPendingPlanPresentation();
-                });
-            }
+                PlanWindow?.Hide();
+                ResetPendingPlanPresentation();
+            });
 
             return agentDecision;
         };
@@ -81,17 +85,27 @@ public partial class ChatWindow
 
     private void EnsurePlanViewerWindow()
     {
-        if (_planViewerWindow != null && IsWindowAlive(_planViewerWindow))
+        if (_planViewerWindow != null && IsPlanWindowAlive())
             return;
 
-        _planViewerWindow = new PlanViewerWindow(this);
-        _planViewerWindow.Closing += (_, e) =>
+        if (_settings.Settings.Llm.EnableNewPlanViewer)
         {
-            e.Cancel = true;
-            _planViewerWindow.Hide();
-        };
+            var v2 = new PlanViewerWindowV2(this);
+            v2.Closing += (_, e) => { e.Cancel = true; v2.Hide(); };
+            _planViewerWindow = v2;
+        }
+        else
+        {
+            var v1 = new PlanViewerWindow(this);
+            v1.Closing += (_, e) => { e.Cancel = true; v1.Hide(); };
+            _planViewerWindow = v1;
+        }
     }
 
+    private bool IsPlanWindowAlive() => IsWindowAlive(_planViewerWindow as Window);
+
+    private Window? PlanWindow => _planViewerWindow as Window;
+
     private void ShowPlanButton(bool show)
     {
         // 레거시: 이전 세션에서 동적 주입된 MoodIconPanel 칩 정리
@@ -127,7 +141,7 @@ public partial class ChatWindow
             return;
 
         EnsurePlanViewerWindow();
-        if (_planViewerWindow != null && IsWindowAlive(_planViewerWindow))
+        if (_planViewerWindow != null && IsPlanWindowAlive())
         {
             if (string.IsNullOrWhiteSpace(_planViewerWindow.PlanText)
                 || _planViewerWindow.PlanText != (_pendingPlanSummary ?? string.Empty)
@@ -135,8 +149,8 @@ public partial class ChatWindow
             {
                 _planViewerWindow.LoadPlanPreview(_pendingPlanSummary ?? "", _pendingPlanSteps);
             }
-            _planViewerWindow.Show();
-            _planViewerWindow.Activate();
+            PlanWindow?.Show();
+            PlanWindow?.Activate();
         }
     }
 
@@ -153,7 +167,7 @@ public partial class ChatWindow
 
     private void UpdatePlanViewerStep(AgentEvent evt)
     {
-        if (_planViewerWindow == null || !IsWindowAlive(_planViewerWindow))
+        if (_planViewerWindow == null || !IsPlanWindowAlive())
             return;
 
         if (evt.StepCurrent > 0)
@@ -162,7 +176,7 @@ public partial class ChatWindow
 
     private void CompletePlanViewer()
     {
-        if (_planViewerWindow != null && IsWindowAlive(_planViewerWindow))
+        if (_planViewerWindow != null && IsPlanWindowAlive())
             _planViewerWindow.MarkComplete();
         ResetPendingPlanPresentation();
     }
@@ -174,6 +188,49 @@ public partial class ChatWindow
         ShowPlanButton(false);
     }
 
+    /// <summary>document_plan 결과 텍스트에서 계획 단계(섹션 목록)를 추출합니다.</summary>
+    private static List<string> ExtractPlanSteps(string planText)
+    {
+        if (string.IsNullOrWhiteSpace(planText))
+            return new List<string> { "문서 계획 검토" };
+
+        // 1) 번호 매긴 단계 (기존 TaskDecomposer)
+        var numbered = TaskDecomposer.ExtractSteps(planText);
+        if (numbered.Count >= 2) return numbered;
+
+        var sections = new List<string>();
+
+        // 2) JSON "heading" 필드 추출 (ExecuteSinglePassWithData 경로)
+        var headingMatches = System.Text.RegularExpressions.Regex.Matches(
+            planText, @"""heading""\s*:\s*""([^""]+)""");
+        foreach (System.Text.RegularExpressions.Match m in headingMatches)
+            sections.Add(m.Groups[1].Value);
+        if (sections.Count >= 2) return sections;
+
+        // 3) HTML <h2> 태그 (ExecuteWithHtmlScaffold 경로)
+        sections.Clear();
+        var h2Matches = System.Text.RegularExpressions.Regex.Matches(
+            planText, @"<h2>([^<]+)</h2>");
+        foreach (System.Text.RegularExpressions.Match m in h2Matches)
+            sections.Add(m.Groups[1].Value);
+        if (sections.Count >= 2) return sections;
+
+        // 4) Markdown ## 헤딩
+        sections.Clear();
+        var mdMatches = System.Text.RegularExpressions.Regex.Matches(
+            planText, @"(?:^|\n)##\s+(.+?)(?:\n|$)");
+        foreach (System.Text.RegularExpressions.Match m in mdMatches)
+        {
+            var heading = m.Groups[1].Value.Trim();
+            if (!heading.StartsWith("[") && !heading.Contains("즉시 실행"))
+                sections.Add(heading);
+        }
+        if (sections.Count >= 2) return sections;
+
+        // 5) 폴백
+        return new List<string> { "문서 계획 검토" };
+    }
+
     private static bool IsWindowAlive(Window? w)
     {
         if (w == null)